【Java】ehcache | EhCache | 集成缓存EhCache

        1、maven项目

        2、SpringBoot项目

	net.sf.ehcache
	ehcache
	2.8.3

1）位于resources根目录

2）示例图

3）ehcache.xml

package hg.demo.spring.boot.web.ehcache;

import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.ehcache.EhCacheCacheManager;
import org.springframework.cache.ehcache.EhCacheManagerFactoryBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;

@Configuration
@EnableCaching
public class EhCacheConfig {
	@Bean
	public EhCacheManagerFactoryBean cacheManagerFactoryBean(){
		EhCacheManagerFactoryBean bean = new EhCacheManagerFactoryBean();
		bean.setConfigLocation(new ClassPathResource("ehcache.xml"));
		bean.setShared(true);
		return bean;
	}
	@Bean
    public EhCacheCacheManager ehCacheCacheManager(EhCacheManagerFactoryBean bean){
      return new EhCacheCacheManager(bean.getObject());
    }	
}

package hg.demo.spring.boot.web.ehcache;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.ehcache.EhCacheCacheManager;
import org.springframework.stereotype.Component;


@Slf4j
@Component("ehCacheUtils")
public class EhCacheUtils {
    @Autowired
    EhCacheCacheManager ehCacheCacheManager;

    
    public void set(String cacheName, String key, String val) {
        log.info("set(),ehcache-设值,cacheName:{}", cacheName);
        log.info("set(),ehcache-设值,key:{}", key);
        log.info("set(),ehcache-设值,val:{}", val);
        ehCacheCacheManager.getCache(cacheName).put(key, val);
    }

    
    public String get(String cacheName, String key) {
        log.info("get(),ehcache-查询,cacheName:{}", cacheName);
        log.info("get(),ehcache-查询,key:{}", key);
        String val = ehCacheCacheManager.getCache(cacheName).get(key, String.class);
        log.info("get(),ehcache-查询,val:{}", val);
        return val;
    }

    
    public void remove(String cacheName, String key) {
        log.info("remove(),ehcache-删除,cacheName:{}", cacheName);
        log.info("remove(),ehcache-删除,key:{}", key);
        ehCacheCacheManager.getCache(cacheName).evict(key);
    }

    
    public void clear(String cacheName) {
        log.info("remove(),ehcache-清空,cacheName:{}", cacheName);
        ehCacheCacheManager.getCache(cacheName).clear();
    }
}

1）@Cacheable

作用：在查询时，会先从缓存中获取，若不存在才再发起对数据库的访问。

@Cacheable(value="策略名，配置在ehcache.xml",key="'key_'+#id")

 说明1： key,不支持枚举，支持静态常量

 说明2： #id，即入参变量名，类型可以是对象，调用 【"#id" -> "#bean.name"】

2）@CacheEvict

作用：通常用在删除方法，用来从缓存中移除相应数据

@CacheEvict(value = "策略名，配置在ehcache.xml", key = "")

3）@CachePut

作用：用于数据新增和修改操作上，用于更新缓存。

@CachePut(value = "策略名，配置在ehcache.xml", key = "")